I don't get anyone saying he should have saved Devin. I don't know what show and live feeds you have been watching, but Devin is a headcase. He's been in and out of alliances and deals like crazy. He can't keep his mouth shut and changes him mind like the weather changes. He's already backstabbed Donny and no one wants him around. If he hadn't used the PoV and allied with Devin, Donny would be a bigger target than he already is (and he's already a fairly big target). Plus Devin would likely change his mind yet again and start dealing with other people. That is after he told the house what Donny did.